Finding the Fourth Proportional to 314,990.33, 472,487.38 and 78,333.02

Step by Step Solution

1. Step 1: Write the proportion equation
   314,990.33 : 472,487.38 = 78,333.02 : x
2. Step 2: Convert to fraction form
   314,990.33/472,487.38 = 78,333.02/x
3. Step 3: Cross multiply
   314,990.33x = 472,487.38 × 78,333.02
4. Step 4: Simplify right side
   314,990.33x = 37,011,360,829.02
5. Step 5: Solve for x
   x = 37,011,360,829.02/314,990.33
6. Step 6: Final answer
   x = 117,499.99